Suppose that: E_4 [[1,3,4],[2,2,3],[-5,4,4]] = [[1,3,4],[8,8,12],[-5,4,4]] Find E_4 and (E_4)^-1

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pramodpandey | College Teacher | (Level 3) Valedictorian

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E_4 [[1,3,4],[2,2,3],[-5,4,4]] = [[1,3,4],[8,8,12],[-5,4,4]]

`E_4A=[[1,3,4],[8,8,12],[-5,4,4]]`

`where`

`A=[[1,3,4],[2,3,3],[-5,4,4]]`

`E_4=[[1,3,4],[8,8,12],[-5,4,4]]A^(-1)`

`=(1/23)[[1,3,4],[8,8,12],[-5,4,4]][[0,4,-3],[-23,29,5],[23,-19,-3]]`

`=(1/23)[[23,15,0],[92,36,-20],[0,20,23]]`

`E^(-1)_4=[[-8.07895,2.26974,1.97368],[13.9211,-3.48026,-3.02632],[-12.1053,3.02632,3.63158]]`

 
 

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